Olly Moss is very popular designer at Threadless and he recently had a successful solo art show (see video below). Threadless might be taking advantage of this sudden fame to sell tons of tees. I think they will sell because their simplicity is very cool.
Link: Select at Threadless
And while you are at Threadless don’t forget to take advantage of some of those $10 T-Shirts and on top of that if you spend $60 or more at Threadless at the moment you can get shipping for free (or just $6 for international orders).
On top of that I think you can still get 25% off if you click on the Threadless banner on the right hand side of this page or this link. It should be automatically deducted at checkout.